Mitigation of Power System Oscillations

减轻电力系统振荡

• 批准号: RGPIN-2016-05892
• 负责人: Annakkage, Udaya
• 金额: $ 2.62万
• 依托单位: University of Manitoba
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=710020
• 关键词: Mitigation; Power; System; Oscillations

Oscillations occur in power systems due to disturbances such as sudden changes in generation, the sudden addition or removal of large loads, transmission lines going out of service, and faults in the system. These oscillations, when not eliminated within an acceptable time, have led to major blackouts in the past, and damaging expensive equipment in the power systems. The presence of oscillations also restricts the amount of energy exported or imported between power utilities, resulting in loss of revenue. Oscillations can be of different types. The most common is electromechanical oscillations, which involves large rotating machines oscillating against each other across the transmission network. These oscillations are of low frequency in the range of 0-5 Hz. The other type is known as sub synchronous oscillations of which the frequency can be up to the nominal system frequency (50 or 60 Hz). These oscillations have been less common in the past, but due to the integration of renewable sources through power electronic interfaces they are becoming more common. Currently there is no procedure or tools available to directly design oscillation mitigating controllers to cater for the modern power grid. I will use state space control design techniques and optimization techniques to propose well tested new procedures to enable the utilities, manufacturers, and consultants to develop reliable and cost effective solutions. The HQPs trained under this program will gain expertise in power system simulation techniques and tools. They will also apply the new techniques to practical situations through collaborations with the industry.

由于发电突变、大负荷突然增减、输电线路停运、系统故障等扰动，电力系统会出现振荡。这些振荡如果没有在可接受的时间内消除，就会导致过去的大停电，并损坏电力系统中昂贵的设备。振荡的存在还限制了电力公司之间的能源输出或输入量，导致收入损失。振荡可以有不同的类型。最常见的是机电振荡，其中涉及大型旋转机器在传输网络上相互振荡。这些振荡的频率较低，范围为 0-5 Hz。另一种类型称为次同步振荡，其频率最高可达标称系统频率（50 或 60 Hz）。这些振荡在过去不太常见，但由于通过电力电子接口集成可再生能源，它们变得越来越常见。 目前，还没有可用于直接设计适应现代电网的减振控制器的程序或工具。我将使用状态空间控制设计技术和优化技术来提出经过充分测试的新程序，使公用事业公司、制造商和顾问能够开发出可靠且具有成本效益的解决方案。根据该计划接受培训的总部人员将获得电力系统仿真技术和工具方面的专业知识。他们还将通过与业界的合作将新技术应用到实际情况中。